Nearly eight months after he was fired for making a racially and sexually disparaging remark about the Rutgers women’s basketball team, Don Imus went back on the radio at 6 a.m. today and vowed he would not say anything like that again.

He also introduced two new cast members — a black woman, Karith Foster, and a black man, Tony Powell, both of them comedians — and said they would join him in conducting “an ongoing discussion about race relations in this country.”